diff options
Diffstat (limited to 'arch/powerpc/mm/numa.c')
| -rw-r--r-- | arch/powerpc/mm/numa.c | 84 |
1 files changed, 45 insertions, 39 deletions
diff --git a/arch/powerpc/mm/numa.c b/arch/powerpc/mm/numa.c index 669a15e7fa76..75b9cd6150cc 100644 --- a/arch/powerpc/mm/numa.c +++ b/arch/powerpc/mm/numa.c @@ -581,30 +581,22 @@ static void verify_cpu_node_mapping(int cpu, int node) } } -static int cpu_numa_callback(struct notifier_block *nfb, unsigned long action, - void *hcpu) +/* Must run before sched domains notifier. */ +static int ppc_numa_cpu_prepare(unsigned int cpu) { - unsigned long lcpu = (unsigned long)hcpu; - int ret = NOTIFY_DONE, nid; + int nid; - switch (action) { - case CPU_UP_PREPARE: - case CPU_UP_PREPARE_FROZEN: - nid = numa_setup_cpu(lcpu); - verify_cpu_node_mapping((int)lcpu, nid); - ret = NOTIFY_OK; - break; + nid = numa_setup_cpu(cpu); + verify_cpu_node_mapping(cpu, nid); + return 0; +} + +static int ppc_numa_cpu_dead(unsigned int cpu) +{ #ifdef CONFIG_HOTPLUG_CPU - case CPU_DEAD: - case CPU_DEAD_FROZEN: - case CPU_UP_CANCELED: - case CPU_UP_CANCELED_FROZEN: - unmap_cpu_from_node(lcpu); - ret = NOTIFY_OK; - break; + unmap_cpu_from_node(cpu); #endif - } - return ret; + return 0; } /* @@ -913,11 +905,6 @@ static void __init dump_numa_memory_topology(void) } } -static struct notifier_block ppc64_numa_nb = { - .notifier_call = cpu_numa_callback, - .priority = 1 /* Must run before sched domains notifier. */ -}; - /* Initialize NODE_DATA for a node on the local memory */ static void __init setup_node_data(int nid, u64 start_pfn, u64 end_pfn) { @@ -985,15 +972,18 @@ void __init initmem_init(void) setup_node_to_cpumask_map(); reset_numa_cpu_lookup_table(); - register_cpu_notifier(&ppc64_numa_nb); + /* * We need the numa_cpu_lookup_table to be accurate for all CPUs, * even before we online them, so that we can use cpu_to_{node,mem} * early in boot, cf. smp_prepare_cpus(). + * _nocalls() + manual invocation is used because cpuhp is not yet + * initialized for the boot CPU. */ - for_each_present_cpu(cpu) { - numa_setup_cpu((unsigned long)cpu); - } + cpuhp_setup_state_nocalls(CPUHP_POWER_NUMA_PREPARE, "POWER_NUMA_PREPARE", + ppc_numa_cpu_prepare, ppc_numa_cpu_dead); + for_each_present_cpu(cpu) + numa_setup_cpu(cpu); } static int __init early_numa(char *p) @@ -1163,18 +1153,34 @@ int hot_add_scn_to_nid(unsigned long scn_addr) static u64 hot_add_drconf_memory_max(void) { - struct device_node *memory = NULL; - unsigned int drconf_cell_cnt = 0; - u64 lmb_size = 0; + struct device_node *memory = NULL; + struct device_node *dn = NULL; + unsigned int drconf_cell_cnt = 0; + u64 lmb_size = 0; const __be32 *dm = NULL; + const __be64 *lrdr = NULL; + struct of_drconf_cell drmem; + + dn = of_find_node_by_path("/rtas"); + if (dn) { + lrdr = of_get_property(dn, "ibm,lrdr-capacity", NULL); + of_node_put(dn); + if (lrdr) + return be64_to_cpup(lrdr); + } - memory = of_find_node_by_path("/ibm,dynamic-reconfiguration-memory"); - if (memory) { - drconf_cell_cnt = of_get_drconf_memory(memory, &dm); - lmb_size = of_get_lmb_size(memory); - of_node_put(memory); - } - return lmb_size * drconf_cell_cnt; + memory = of_find_node_by_path("/ibm,dynamic-reconfiguration-memory"); + if (memory) { + drconf_cell_cnt = of_get_drconf_memory(memory, &dm); + lmb_size = of_get_lmb_size(memory); + + /* Advance to the last cell, each cell has 6 32 bit integers */ + dm += (drconf_cell_cnt - 1) * 6; + read_drconf_cell(&drmem, &dm); + of_node_put(memory); + return drmem.base_addr + lmb_size; + } + return 0; } /* |